Toxic air pollutants are poisonous substances in the air that come from natural sources (for example, radon gas coming up from the ground) or from manmade sources (for example, chemical compounds given off by factory smokestacks) and can harm the environment or your health.
Subsequently, Scorpius X-1 was discovered in 1962 by a team, under Riccardo Giacconi, who launched an Aerobee 150 sounding rocket carrying a highly sensitive soft X-ray detector designed by Frank Paolini.
Democritus was a pre-Socratic Greek philosopher (born at Abdera in Thrace around 460 BC; died in 370 BC). Democritus was a student of Leucippus, and co-originator of the belief that all matter is made up of various imperishable indivisible elements which he called atomos, from which we get the English word atom.emocritus was a pre-Socratic Greek philosopher (born at Abdera in Thrace around 460 BC; died in 370 BC). Democritus was a student of Leucippus, and co-originator of the belief that all matter is made up of various imperishable indivisible elements which he called atomos, from which we get the English word atom.